#include <stdio.h>
#include <ctype.h>

int can_print(char c);

int print_letters(char arg[])
{
  int i;
  for(i=0; arg[i] != '\0'; i++) {
    char c = arg[i];
    if(can_print(c)) {
      printf("'%c' == %d\n", c, c);
    }
  }
}

/*int can_print(char c)
{
  return isalpha(c) || isblank(c);
}
*/


int main(int argc, char *argv[])
{
  print_letters(argv[1]);
  
  return 0;
}
